Geometry nodes - Extracting index at maximum value

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1

Hey everyone, I was just wondering if there is a quick way I can extract the index from a list of “positions”. What I mean is I calculate the length of rays from an array of lines generated on a line. And I want to get the index at the maximum length, this should be pretty straight forward but I am really stuck at this step for days.

For example, at this screenshot I need the index 6 or 7 (doesnt matter) because its length is the max.
Any help appreciated.

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image238×541 18 KB

2

Here’s the first thing that comes to mind.

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50012476×1407 256 KB

Extracting index of the longest edge.

capture_index.blend (858.9 KB)

2 Likes
3

Thanks a lot!

4

Since it is the first result that shows for argmax in GN, I’ll share my solution :

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image1634×528 89.1 KB

(fails if several values are exactly the max :/)

1 Like
5

Fix for when several values are the max (takes the 1st one)

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image2978×838 216 KB

6

Only thing that you need to do is to use Sort Elements and take indices of some range of elements in the end of result geometry.